Honing head



C- P. SMITH June 27, 1961 HONING HEAD Filed April 15, 1957 INVENTOR.

CHARLES P. SMITH ATTORNEY .end to a conventional machine.

St t Patent 2,989,825 HONING HEAD Charles P. Smith, Detroit, Michassignor, by mesne assignments, to Jes-Cal Company, Fraser, Mich., acorporation of Michigan Filed Apr. 15, 1957, Ser. No. 653,014 8 Claims.(Cl. 1-1843) This invention relates to a universal honing head for usein controlling the position of tools in relation to the bores of workpieces, particularly honing, reaming and boring tools, irrespective ofthe type of machine by which such tools may be actuated.

An object of the present invention is to provide a honing head having adriven spindle adapted to be coupled at one end to a source of power andthrough its other end to a honing tool whereby upon manual rotation ofthe head, either while the tool is at rest or during rotation thereof,the cutting or abrading element of the tool may be readily expanded tomaintain said element in contact with the work so as to insureelfective, rapid and accurate removal of the stock.

In accordance with the embodiment of the invention herein'illustrated,by way of example, the universal head for a tool may be actuated to pushor pull the toolforwardly or backwardly relative to the work while thetool is rotating, thus avoiding the necessity for stopping the mechanismfor any readjustment or repositioning of the tool to expand it intocontact with the work.

- A further important feature of the invention is to provide a universalhead for controlling the expansion of the abrasive portion of the tool,to move it longitudinally through the bore while the tool is rotating,and in such control of the abrasive the latter can be brought intointimate contact with all portions of the bore to hone the walls of theWork to effect the precise honing thereof.

Other objects of this invention will appear in the following descriptionand appended claims, reference being had to the accompanying drawingforming a part of this specification wherein like reference charactersdesignate corresponding parts in the several views.

FIG. 1 is a fragmentary longitudinal view, partly in section,illustrating a honing head embodying the present invention, the headhaving a portion of the honing means positioned with respect thereto.

. FIG. 2 is a sectional detail view taken substantially on a line 2-2 ofFIG. 1.

FIG. 3 is a fragmentary longitudinal view, partly in section,illustrating a honing tool which may be incorporated for use with thehoning head of the present invention.

FIG. 4 is a sectional detail view taken substantially on a line 4-4 ofFIG. 1.

Before a detailed explanation of the present invention it is to beunderstood that the invention is not limited in its application to thedetails of construction and arrangement of parts illustrated in theaccompanying drawings, since the invention is capable of otherembodiments and of being practiced or carried out in various ways. Alsoit is to be understood that the phraseology or terminology employedherein is for the purpose of description and not of limitation.

- In the present embodiment there is illustrated a honing head orapparatus which is attachable at its driven The honing head, dependingupon the type of machine with which it is used, may extend eithervertically or at an angle, such as 45, or horizontally. In the presentinstance the honing head is shown in a horizontal position, although itis understood that this is merely for illustrative purposes.

Referring to the drawings wherein there is illustrated, by Way ofexample, one embodiment of the present invention, there is provided adriven shaft or spindle 10 which is adapted to be coupled to a source ofpower such as provided by a boring or honing machine (not shown). Thespindle 10 is rotatable with respect to a sleeve member 11 non-rotatablypositioned with respect to the machine with which the control head isused. The sleeve member 11 has an enlarged head portion 12 provided withan inward annular groove 14 adapted to receive one end of a tubularcasing or outer adjusting sleeve 15. For securing the sleeve 11 againstrotation a holding member is provided, a portion only of which has beenshown as including a laterally extending arm or rod 16 secured to theportion 12. The other end of the rod 16 is preferably secured to somefixed part of the machine with which the honing head is used. A tubularspindle extension 17 is secured to the inner end of spindle 10 as by apin 18. The spindle extension 17 is spaced from and rotatably supportedin sleeve head portion 12 by a roller bearing indicated generally at 20located by a face plate 22 removably secured to the head portion 12..

The outer end of spindle extension 17 is enlarged and threaded at 24,adjacent which enlargement is a roller bearing indicated generally at 25to anti-frictionally sup-v port the outer end of adjusting sleeve 15. Asubstantial portion of sleeve '15 is supported on the outer bearingsurface of sleeve member 11. A hearing retainer 27 is threaded on theouter end of sleeve 15 to locate bear ing 25 with respect thereto.Interpositioned between the bearing 25 and the inner surface of sleeve15 is a bearing cup 26, which is pressed into the outer end of sleeve 15for rotation therewith. I

The interior surface of sleeve 11 is threaded at; 29 for engagement withan exteriorly threaded nut or inner adjusting sleeve which, upon manualrotation of outer adjusting sleeve 15, will be rotated therewith andalso moved longitudinally thereof either forward or backward therein. Anelongated key 31 is longitudinally located within the sleeve 15 by meansof pins 32 and secured to the inner surface thereof by means such asscrews 33. A retainer ring 35 is secured to the inner end of sleeve 30by means of screws 36 (FIG. 2). A keyway or slot 37 is provided inretainer ring 35 to receive the key 31. It will be understood that inaddition to mounting the sleeve 30 for turning with the adjusting sleeve15 the key 31 and retainer ring 35 provide means for slidably guidingthe nut or sleeve 30 in its longitudinal fore and aft movement.

The nut 30 is provided with a bore 39 for the reception of a pair ofthrust bearings 40 and 41 presently to be described. These bearingsconsist of inner and outer races 42 and 43 respectively, and disposed ineach pair of races are the balls 44. Intermediate the inner races 42 isa tool expansion control pin member 45 between which and the inner races42 is disposed a plain bear+ ing 46. The retainer 35 also serves topositionally retain the above bearings within the nut 30. The purpose ofassembling the aforesaid elements interiorly of the nut is to enable thecontrol pin member 45 to be freely rotated therein with a minimum offrictional resistance as hereinafter more particularly described.

Extending midway of the ends of the spindle extension 17 a pair ofopposed parallel slots 50 are pro vided through the walls thereof.Within the bore in the spindle extension 17 is an adapter 52, the outerend of which has a bore 53 for receiving the inner end of a tool controlrod 55 that is carried by the tool 56 (see FIGURE 3), the outer end ofwhich tool carries cutting or abrading elements 57. The tool'56 isprovided with a hollow connecting shank 63 of convenient lengthdetachably secured to the threaded end 24 of spindle exe tension 17. Theshank 63 and spindle extension 17 are secured together in end to endrelation by means such as threaded connecting collar 64, rotary drivebeing imparted to the shank 63 by means of a driving key 65 attached tothe end of extension 17 receivable in a radial slot 66 in the couplingportion 67 of the shank 63. The rod 55 is secured to the aforesaidadapter 52 by means of a plurality of balls 58 received in acircumferential groove 59 in the control rod and radial apertures 60 inthe control member. Thus, when the spindle is rotated, it will rotatetherewith the control member 45 within the nut or inner adjusting sleeve30 as previously referred to above. It will be understood that, althoughthe inner adjusting sleeve 30 is not afiected by the rotation of thecontrol member or pin 45 therein, said nut may be freely shiftedlongitudinally of the spindle extension 17 upon manual rotation of thesleeve 15, and such longitudinal movement may be made while the shaft isrotating.

The honing tool 56 illustrated in FIG. 3 comprises a cylindrical stoneholding body portion 62 from which the shank 63 extends. The bodyportion 63 is provided with equally spaced radial stone holder guideslots 68. These radial cross slots 68 extend entirely through theannular body portion 62 and terminate at the axial bore 69 thereof.

Mounted within each cross slot 68 is a stone holder 70 having a smoothfit within the slot. Fitting within an outer longitudinal slot in eachstone holder 70 is a honing stone or abrading element 57, each honingstone being adhesively secured within the slot and having the workportion thereof projecting radially outwardly from the stone holder. Asshown, the elongated honing stones 57 terminate short of the ends of thestone holders to provide supports for annular contracting springs 72which function to retract the stone holders in the usual manner.

Each stone holder 70 is provided with a central inwardly openinglongitudinal slot 73 extending the full length thereof. Within theforward end of each slot is fitted a front cam shoe or member 74 securedin position as by rivets. The inner edge of each cam member 74 istapered rearwardly and upwardly to form a cam edge 76. Within the rearend of each slot 73 is fitted a rear cam shoe or member 77 also securedin position by rivets. These cam shoes are identical to the cam shoes 74and have similar cam edges 79.

Adjustable axially within the bore 69 is a cam unit having cam meanscooperable with the front and rear cam shoes 74 and 77 for impartingoutward radial displacement to the stone holders 70. Said unit includesrod 55 disposed axially of the bore 69 and actuated by the adaptermember 52 described above.

In the operation of the control head as above described, after the tool56 is attached to the spindle 10 and the control rod 55 is connectedthrough the adapters 52 and the control pin member 45, the assembly isready to perform its cutting or honing operation. The tool 56 isinserted into the bore of the work piece and the sleeve is then rotatedto bring the cutting tool or abrasive into contact with the work pieceto be acted upon. The contact of the cutter or abrasive with the workpiece is effected when through the rotation of the sleeve 15, either tothe right or left, nut or sleeve 30 is likewise moved thereby either tothe right or left. In such movement the control member 45 moves in thesame direction with the nut 30 and because member 45 through itsconnection with adapter 52 and the latters connection to the control rod55 as before described, such movement of the control member results ineither pulling or pushing said control rod longitudinally of the workpiece so that the abrading elements 57 can be extended into honing orcutting relationship with the work. The graduations 80 on sleeve 15permit the operator to readily determine the precise adjustmentnecessary to expand the 4 honing stones to attain the finish required onthe work.

I claim:

1. In a honing apparatus having rotary drive spindle means and anendwise shiftable rod in said spindle for controlling the radialadjustment of honing stone holders, a non-rotatable supporting headhaving an internally threaded cylindrical extension, an inner adjustingsleeve extending within said extension and having threaded engagementtherewith, a rotatable outer adjusting sleeve connected at all times tosaid head and embracing said cylindrical extension in bearing engagementtherewith, means for connecting said adjusting sleeves to provide forlongitudinal adjustment of the inner sleeve upon manually turning theouter sleeve, and means for connecting said rod to said inner sleeve.

2. In a honing apparatus having rotary drive spindle means and anendwise shiftable rod in said spindle for controlling the radialadjustment of honing stone holders, a non-rotatable supporting headhaving an internally threaded cylindrical extension, an inner adjustingsleeve extending within said extension and having threaded engagementtherewith, a rotatable outer adjusting sleeve connected at all times tosaid head and embracing said cylindrical extension in bearing engagementtherewith, means for connecting said adjusting sleeves to provide forlongitudinal adjustment of the inner sleeve upon manually turning theouter sleeve, and longitudinally adjustable means rotatable relativelyto said inner sleeve for connecting said rod thereto.

3. In a honing apparatus having rotary drive spindle means and anendwise shiftable rod in said spindle for controlling the radialadjustment of honing stone holders, a non-rotatable supporting headhaving an internally threaded cylindrical extension, an inner adjustingsleeve extending within said extension and having threaded engagementtherewith, a rotatable outer adjusting sleeve connected at all times tosaid head and embracing said cylindrical extension in bearing engagementtherewith, means for connecting said adjusting sleeves to provide forlongitudinal adjustment of the inner sleeve upon manually turning theouter sleeve, and means for connecting said rod to said inner sleeve,said connecting means including a pin connected to said rod andshiftable within a guide slot in said spindle means.

4. In a honing apparatus having rotary drive spindle means and anendwise shiftable rod in said spindle for controlling the radialadjustment of honing stone holders, a non'rotatable supporting headhaving a single internally threaded cylindrical extension, a singleinner adjusting sleeve extending within said extension and having screwthreaded engagement therewith, a rotatable outer adjusting sleevepermanently connected to said head and embracing said cylindricalextension in permanent bearing engagement therewith, a key and slotconnection between said adjusting sleeves to provide for rotatablemovement of the inner sleeve with the outer sleeve upon turning thelatter together with simultaneous longitudinal adjustment of the innersleeve, and means for connecting said rod to said inner sleeve.

5. In a honing apparatus having rotary drive spindle means and endwiseshiftable hone adjusting means therein, a hollow non-rotatablesupporting member having an inner cylindrical surface, an innerrotatable adjusting sleeve telescoped into said supporting member andhaving a threaded connection with said inner cylindrical surface of saidsupporting member to provide for longitudinal adjustment of said sleeveupon rotation thereof relative to said supporting member, an outerrotatable adjusting sleeve mounted on said supporting member and withinwhich said inner sleeve is longitudinally movable, means for permanentlyconnecting said adjusting sleeves to pro vide for rotation of both saidsleeves and longitudinal adjustment of the inner sleeve upon turning theouter sleeve, and means including a member rotatable with and shiftablelongitudinally of the spindle means for connecting said inner sleeve tosaid hone adjusting means.

6. In a honing apparatus having rotary drive spindle means and endwiseshiftable hone adjusting means there in, a hollow non-rotatablesupporting member having an inner cylindrical surface, an innerrotatable adjusting sleeve telescoped into said supporting member andhaving a threaded connection with the inner cylindrical surface of anoverlying extension of said supporting member; to provide forlongitudinal adjustment of said sleeve upon rotation thereof relative tosaid supporting member, an outer rotatable adjusting sleeve mounted onsaid supporting member and within which said inner sleeve islongitudinally movable, means for permanently connecting said adjustingsleeves to provide for rotation of both said sleeves and longitudinaladjustment of the inner sleeve upon turning the outer sleeve, andconnecting means disposed within said inner sleeve for connecting thesame to said hone adjusting means.

7. In a honing apparatus having rotary drive spindle means and endwiseshiftable hone adjusting means therein, a non-rotatable supportingmember, an inner rotatable adjusting sleeve having a threaded connectionwith an overlying extension of said supporting member to provide forlongitudinal adjustment of said sleeve upon rotation thereof, an outerrotatable adjusting sleeve mounted on said supporting member, means forpermanently connecting said adjust-ing sleeves to provide for rotationand longitudinal adjustment of the inner sleeve upon turning the outersleeve, and connecting means disposed within said inner sleeve forpermanently connecting the same to said hone adjusting means, saidconnecting means including a control pin member rotatable with andadjustable longitudinally of the spindle means and also rotatablerelative to said inner and outer sleeves.

8. In a honing apparatus having rotary drive spindle means and anendwise shiftable rod in said spindle for controlling the radialadjustment of honing stone holders, a non-rotatable supporting headhaving an internally threaded cylindrical extension, an inner adjustingsleeve extending at all times within said extension and having threadedengagement therewith, an outer rotatable adjusting sleeve mounted onsaid cylindrical extension, means for connecting said adjusting sleevesto provide for longitudinal adjustment of the inner sleeve upon manuallyturning the outer sleeve, and means for permanently connecting said rodto said inner sleeve, said connecting means including a control pinmember rotatable with and adjustable longitudinally of the spindle meansand also rotatable relative to said inner and outer sleeves.

References Cited in the file of this patent UNITED STATES PATENTS2,015,940 Keller Oct. 1, 1935 2,692,451 Hartzell et al. Oct. 26, 1954FOREIGN PATENTS 899,598 Germany Dec. 14, 1953

